Table 2	CITED IN TEXT  |  ASCII  |  TYPESET IMAGE  |
Recommended Elemental Abundances of the Proto-Sun (Solar System Abundances)

Element	A(El)0	N(El)0	Element	A(El)0	N(El)0	Element	A(El)0	N(El)0
H...	12	2.431 × 1010	Ge...	3.70 ± 0.05	120.6	Sm...	1.02 ± 0.04	0.2542
He...	10.984 ± 0.02	2.343 × 109	As...	2.40 ± 0.05	6.089	Sm*...	1.02 ± 0.04	0.2554
Li...	3.35 ± 0.06	55.47	Se...	3.43 ± 0.04	65.79	Eu...	0.60 ± 0.04	0.09513
Be...	1.48 ± 0.08	0.7374	Br...	2.67 ± 0.09	11.32	Gd...	1.13 ± 0.02	0.3321
B...	2.85 ± 0.04	17.32	Kr...	3.36 ± 0.08	55.15	Tb...	0.38 ± 0.03	0.05907
C...	8.46 ± 0.04	7.079 × 106	Rb...	2.43 ± 0.06	6.572	Dy...	1.21 ± 0.04	0.3862
N...	7.90 ± 0.11	1.950 × 106	Rb*...	2.44 ± 0.06	6.694	Ho...	0.56 ± 0.02	0.08986
O...	8.76 ± 0.05	1.413 × 107	Sr...	2.99 ± 0.04	23.64	Er...	1.02 ± 0.03	0.2554
F...	4.53 ± 0.06	841.1	Sr*...	2.99 ± 0.04	23.52	Tm...	0.18 ± 0.06	0.03700
Ne...	7.95 ± 0.10	2.148 × 106	Y...	2.28 ± 0.03	4.608	Yb...	1.01 ± 0.03	0.2484
Na...	6.37 ± 0.03	5.751 × 104	Zr...	2.67 ± 0.03	11.33	Lu...	0.16 ± 0.06	0.03572
Mg...	7.62 ± 0.02	1.020 × 106	Nb...	1.49 ± 0.03	0.7554	Lu*...	0.17 ± 0.06	0.03580
Al...	6.54 ± 0.02	8.410 × 104	Mo...	2.03 ± 0.04	2.601	Hf...	0.84 ± 0.04	0.1699
Si...	7.61 ± 0.02	1.00 × 106	Ru...	1.89 ± 0.08	1.900	Hf*...	0.84 ± 0.04	0.1698
P...	5.54 ± 0.04	8373	Rh...	1.18 ± 0.03	0.3708	Ta...	-0.06 ± 0.03	0.02099
S...	7.26 ± 0.04	4.449 × 105	Pd...	1.77 ± 0.03	1.435	W...	0.72 ± 0.03	0.1277
Cl...	5.33 ± 0.06	5237	Ag...	1.30 ± 0.06	0.4913	Re...	0.33 ± 0.04	0.05254
Ar...	6.62 ± 0.08	1.025 × 105	Cd...	1.81 ± 0.03	1.584	Re*...	0.36 ± 0.04	0.05509
K...	5.18 ± 0.05	3692	In...	0.87 ± 0.03	0.1810	Os...	1.44 ± 0.03	0.6738
K*...	5.18 ± 0.05	3697	Sn...	2.19 ± 0.04	3.733	Os*...	1.44 ± 0.03	0.6713
Ca...	6.41 ± 0.03	6.287 × 104	Sb...	1.14 ± 0.07	0.3292	Ir...	1.42 ± 0.03	0.6448
Sc...	3.15 ± 0.04	34.20	Te...	2.30 ± 0.04	4.815	Pt...	1.75 ± 0.03	1.357
Ti...	5.00 ± 0.03	2422	I...	1.61 ± 0.12	0.9975	Au...	0.91 ± 0.06	0.1955
V...	4.07 ± 0.03	288.4	Xe...	2.35 ± 0.02	5.391	Hg...	1.23 ± 0.18	0.4128
Cr...	5.72 ± 0.05	1.286 × 104	Cs...	1.18 ± 0.03	0.3671	Tl...	0.88 ± 0.04	0.1845
Mn...	5.58 ± 0.03	9168	Ba...	2.25 ± 0.03	4.351	Pb...	2.13 ± 0.04	3.258
Fe...	7.54 ± 0.03	8.380 × 105	La...	1.25 ± 0.06	0.4405	Pb*...	2.12 ± 0.04	3.234
Co...	4.98 ± 0.03	2323	Ce...	1.68 ± 0.02	1.169	Bi...	0.76 ± 0.03	0.1388
Ni...	6.29 ± 0.03	4.780 × 104	Pr...	0.85 ± 0.03	0.1737	Th...	0.16 ± 0.04	0.03512
Cu...	4.34 ± 0.06	527.0	Nd...	1.54 ± 0.03	0.8355	Th*...	0.26 ± 0.04	0.04399
Zn...	4.70 ± 0.04	1226	Nd*...	1.54 ± 0.03	0.8343	U...	-0.42 ± 0.04	9.306 × 10-3
Ga...	3.17 ± 0.06	35.97				U*...	+0.01 ± 0.04	24.631 × 10-3

Note.Values for elements marked with an asterisk are abundances 4.55 × 10⁹ yr ago. Mass fractions for proto-Sun: X₀ = 0.7110, Y₀ = 0.2741, Z₀ = 0.0149, and X₀/Z₀ = 0.0210. The astronomical log scale and the cosmochemical abundance scale by number are coupled by A(El)₀ = log[N(El)] + 1.614.